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diff --git a/testsuite/vests/vhdl-93/ashenden/compliant/ch_13_fg_13_13.vhd b/testsuite/vests/vhdl-93/ashenden/compliant/ch_13_fg_13_13.vhd
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+
+-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version.
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+-- for more details.
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+-- ---------------------------------------------------------------------
+--
+-- $Id: ch_13_fg_13_13.vhd,v 1.3 2001-10-26 16:29:35 paw Exp $
+-- $Revision: 1.3 $
+--
+-- ---------------------------------------------------------------------
+
+-- not in book
+
+entity computer_system is
+end entity computer_system;
+
+
+library stimulus;
+use stimulus.stimulus_generators.all;
+
+-- end not in book
+
+architecture structure of computer_system is
+
+ component decoder_2_to_4 is
+ generic ( prop_delay : delay_length );
+ port ( in0, in1 : in bit;
+ out0, out1, out2, out3 : out bit );
+ end component decoder_2_to_4;
+
+ -- . . .
+
+ -- not in book
+
+ signal addr : bit_vector(5 downto 4);
+ signal interface_a_select, interface_b_select,
+ interface_c_select, interface_d_select : bit;
+ -- end not in book
+
+begin
+
+ interface_decoder : component decoder_2_to_4
+ generic map ( prop_delay => 4 ns )
+ port map ( in0 => addr(4), in1 => addr(5),
+ out0 => interface_a_select, out1 => interface_b_select,
+ out2 => interface_c_select, out3 => interface_d_select );
+
+ -- . . .
+
+ -- not in book
+
+ all_possible_values(addr, 10 ns);
+
+ -- end not in book
+
+end architecture structure;